Evaporator.



T. SUZUKI.

EVA 0 ATOB.

` APPLIOATION 1 D IDEO. 5. 1907.

Patented Mar.23,1909. 5 xnBB'rs-SBBET 1.

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EVAPORATOR.

APPLIUATION FILED 1720.5, 1907.

Patented Mar. 23 9.

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T. SUZUKI.

BVAPOEATOR.

APPLIOATION PILnDADm. 19o?.

Patented Mar. 23, 1909.

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TOZABURO SUZUKI, OF SUNAMURA, JAPAN.

.EVAPORATOR.

Specification of Letters Patent.

Patented March 23, 1909.

Application filed December 5, 1907. Serial No. 405,292.

To all whom it may concern.'

Be it known that I, TOZABURO SUZUKI, a subject of the Emperor of Japan,residing at Sunamura, Province of Tokio, Empire of la an, have inventedcertain new and usefu 1m rovements in Evaporators, of which thefollbwing is a specification.

The object of this invention is to provide an evaporator which will beefficient in action and which will utilize t0 the fullest possibleextent the heat units applied thereto for effecting evaporation, afurther object being to restrict the area of the evaporating surfaces asmuch as possible and to` so arrange the same with respect to the heatapplied thereto as to render the entire area of said evaporatingsurfaces effective.

The invention will be more fully described in connection With theaccompanyingv draW- ings and will be-more particularly pointed out andascertained in and by the appended claims.

ln the drawings: Figure 1 is a longitudinal sectional view, partly inelevation, of an evaporator illustrating one embodiment of my invention.Fig. 2 is a similar view of a modified form of the invention. Fig. 3illustrates a further modification of the invention. Fig. 4 illustratesa further modification. Fig. 5 illustrates a still further modification.Fig. 6 is a detailed sectional view on line 6-6 of Fig. 5. Fig. '7 is adetailed sectional view on line 7 7 of Fig. 5. f

Considered generally the invention coin-` prises means for sup lyingheat, which may e in the forni of a urnace or the like, to a receivingvessel which may if desired be superposed upon the furnace and Awhichserves the purpose of a receiver for liquid during the process ofevaporation and concentration. Upon the receiver or vessel and locatedin a manner to receive the products of combustion of the furnace duringthe passage thereof to a staclr or outlet is located one or moreevaporators which are preferably hollow in construction and are adaptedto deliver the liquid to the receiving vessel. Means are provided, Whichpreferably forms a part of the furnace, Ifor directing the roducts ofcombustion against theinner surfaces of said evaporators so that theouter surfaces thereof may be heated to a high temperature for thepurpose of evaporating the liquid. Means are provided for delivering theliquid tothe exterior ofk said evaporators to bring the former intocontact with the heated walls of the latter and thereby effect thedesired vaporization and resultant concentration.

Considered more specifically and with special reference to the formshown in Fig. 1, 1 designates a furnace as a whole which as shown isprovided with a fire box 2, a grate 3 and suitable outlet or stack 4.The usual fuel door 5 and ash pit 6 are shown and beneath the stack 4 isprovided a closable passage 7 through which collecting soot may beremoved. Une or. a plurality of deflectors are shown as interposed inthe path of the products of combustion passing from the fire box 2 tothe stack 4 and conveniently said defiectors consist of extensions ofthe furnace 1 and the same are indicated by 8. A receiving vessel,preferably in the form of a shallow pan 9, is located in a manner to beacted upon by the products of combustion and preferably said vessel orpan is mounted directly upon the furnace 1 as at 10 and 11. Said pan 9is provided with openings 12 Which permit the deflectors 8 to projectupwardlyl therethrough as clearly shown in Fig. 1. Said openings 12 arerelatively enlarged with respect to the deflectors 8 to afford an openspace on opposite sides thereof for the passage of the products ofcombustion, the said deflectors 8 as shown in Fig. 6 being of sufficientWidth to prevent lateral passage and serving to force the products ofco1nbustion to pass above said deflectors. Evaporators, preferably inthe forni of cylinders 13, are'shown as mounted upon the pan 9 and areprovided with internal diameters which areequal to the diametersof theopenings 12. Said evaporators when secured in place as shown surroundthe deflectors 8 andare of sufficient height to permit the products ofcombustion to pass over the upper ends of said deflectors which latterthereby serve to uniformly force the products of combustion intoengagement with the entire inner area of the evaporator-s therebyserving to efficiently heat the same and resent to the liquid auniformly and highly heated exterior evaporating surface as willhereinafter more fully appear. If it is desired to increase the exteriorsurface area of the evaporators and thereby obtain a more extensiveevaporating surface the cylinders 13 may be corrugated as shown in Fig.1 or the Walls thereof may be straight as shown in Fig. 4. As shown theevaporators are provided with liquid receiv ers which are convenientlydisposed upon k the upper ends ofsaid evaporators and are designed toreceive the liquid to be evaporated and heat the same and subsequentlydischarge said liquid upon the exterior or evaporating surfaces 14. Asshown in Fig. 1. the liquid receiver is formed by an upper wall 15 ofthe cylinder 1 3 'and a flange 16 which may i f desired be formed byextending the wall of the cylinder 13 above the upper wall 1 5. The wall15 is provided with an opening and a receiving member 177 preferablyformed in a separable part, lis mounted on said wall 15 and spans theopening therein and is thereby subjected to the action of the productsof combustion as will be obvious by reference to Fig. 1. l. convenientlymake the member 17 convex so that the liquid received thereon will passdirectly toward the :flange 16 and into the cavity formed thereby sothat a relatively small quantity of liquid will be retained therebyeffecting more rapid heating thereof. When the cavity formed by theflange 16 .is 'lilled the liquid overflows and passes down thecorrugated evaporating surace 14 where it is discharged into the vessel9. The receiver 17 is also provided with a cavity 1S into which theliquid is first fed and from which it overflows upon the concavedsurface to the cavity formed by the flange 16. As shown the liquid isfed through a pipe 19 and desirably said pipe extends into the cavity 1Sa slight distance to form a seal and prevent the vapor from passingupwardly in said feed pipe in case the feed is sluit off temporarily.

According to the form shown in Fig. 1 a pre-heater is provided to heatthe liquid before the same is delivered to the evaporator andconveniently the pre-heater re- .ceives the vapor from the evaporator soas to efiect such preliminary heating of the liquid. As shown and inorder that the passage of the vapor may be controlled and made toperform this :function the evaporator is provided with a casing or shell20 which is conveniently mounted upon the pan 9 and is )rovided withopenings 21 to permit the liquid to be discharged from the evaporatorinto the pan proper. Said casing 2O is provided with an upper wall 22which is conveniently located somewhat below the upper margin of saidcasing thereby forming a receiving cavity provided with outlets 24 thepurpose of which will hereinafter more fully appear. A cylinder 25 ismounted upon said wall 22 and is provided with an upper wall 26 betweenwhich and the wall 22 is provided a plurality of vapor tubes 27 whichare closed to the cylinder 25 and permit passage of the vaportherethrough to an outlet 2S which may discharge to the outer air or toa condenser (not shown). Cylinder 25 is provided Y with openings 29whereby the surplus liquid may overflow into the cavity 23 and maydischarge therefrom down the outer wall of the casing 2O to the pan 9..Said feed pipe 19 extends sonic distance into the cylinder 2o so as toinsure the retention oll a quantity ol' liquid in said cylinder to beheated by thc vapor from the cvaporators which not only plays upon thewall 2Q but passes uilwfardly i through the lluesv 27. Desirably th(`liquid Vis delivered from a feed pipe 3() to a reservoir 31 which latterdischarges to a delivery pipe 32 connected by branch pipes 33 with thecylinders 25. Preferably the branch pipes 33 are provided with valves Blto pci-init olA independent regulation of the several evaporator unitsoi which three ar(` herein shown in this construi'ftion. .l condensingreceiver is disposed beneath the tubes 2T and serves to collectcondensed liquid falling therefrom. A condensing receiver 36 is alsoprovided for the casing 2t) and said receivers are convenientlyconnected by pipes 37 and 3S with a discharge pipe 3). 1`fyhen it isdcsired to empty thc cylinder 25 aiticr tht` e f'aporators are cut outol' service pipes -lt may be utilized.

ln the form shown in Fig. l the casings tl are dispensed with andlikewise the preheate-rs and the vapor is permitted to discharge intoopen space. ln this` l'orni ol' thc invention the delivery pip(` 32 isprovided with valvcd brancl. pipes 41 which deliver directly to theconcave receivers 17. Other wise the apparatus shown in Fig. l perlornisits function in substantially the saine manner as that shown in Fig. 1.

ln the form shown in Fig. 5 a dii'l'crcnt method is provided for heatingthe liquid prior to its delivery to the evaporator. A\s shown in thisconstruction the liquid is discharged from the reservoir 31 to adelivery pipe 32 which is provided with valv-cd branch pipes 41, one. ofwhich is shown at one side o' the pipe 44 and the other of which isshown directly behind the pipe 44 and both of which are shown in dottedlines. ln this construction the dcflectors 4S are. made in two scctionsand pipes 44 are embedded therein and are exposed to the action of theproducts olI combustion, and the pipes 41 discharge into said pipes 44.The pipes 44, at their upper ends7 discharge into receivers 4 5 formedin the upper ends of the ewiporators 1?). Vln this construction theorwration is substantially the same as in prior constructions withrespect to the passage of th(` liquid from the receiver 45 to the pan(J.

ln the form shown. in Fig. 3 all of the features illustrated in Fig. 1.are retained except the feed pipe 1Q and to this form also added thefeature described in connection with. Fig. 5. In Fig. 3 all of theliquid fed to the cylinder 25 is discharged therefrom over the casing ZOint-o the pan 9 as hereinbefore described. The delivery pipe 32 isprovided with branch valve pipes 46 delivering to the cylinder 25 andalso with branch valve pipes 47 delivering to pipes conllt) structed inthe manner clearly shown in Fig. 5 so that the liquid is preheated priorto its delivery to the evaporators 13.

In Fig. 4 the cylinders 25 are dispensed with and the outlets 48 areconstructed in a manner to form receiving chambers 49 pro vided withoutlets 50. The liquid is delivered tothe chambers 49 and passes throughoutlets 50 down the exterior of the casing 20 in the manner described inconnection with Fig. 1. The liquid is also pre-heated prior to itsdelivery to the evaporators by construction similar to that described inconnection with the form shown in Fig. 5. In this form the uppercondensing receiver 5l is constructed and arranged similar to thereceiver 36.

I claim l. An evaporating apparatus comprising in combination, areceiver provided with an opening for passage of the products ofcombustion, a hollow evaporator forming with said opening a iiue for theproducts of combustion and having an exterior evaporating surfacedelivering to said receiver, a deflector projecting into said evaporatorto form therewith a return flue and direct the products of combustionagainst the interior of the evaporator, and means for delivering theliquid to the exterior of said evaporator.

2. An evaporatingy apparatus comprising in combination, a shallowreceiver provided with an opening for the products of combustion, ahollow evaporator forming with said opening a iiue for the products ofcombustion and having an exterior corrugated evaporating surfacedelivering to said receiver, a deiiector projecting into said iiue todirect the products of combustion against the interior wall thereof, andmeans delivering the liquid to the top of said evaporator.

3. An evaporating apparatus comprising in combination, a verticallydisposed hollow evaporator provided with an exterior evaporating surfaceand forming with its interior a flue for the products of combustion, adeiiector projecting into said evaporator to direct the products ofcombustion against the interior walls thereof, means delivering theliquid to be evaporated to the exterior and at the top of saidevaporator, and a relatively shallow pan receiving the liquid dischargedby said evaporator.

4. An evaporating apparatus comprising in combination, a shallowreceiving pan prol vided with an opening for the products of combustion,a hollouT evaporator forming with said opening a flue'for the productsof combustion and having an exterior corrugated evaporating surface, adeflector projecting into said iiue to direct the products of combustionagainst the interior of said evaporator, means delivering the liquid tobe evaporated to the exterior of said evaporator wherefrom the same 1sdellvered to said pan,

l a shell surrounding said evaporator and rovided with an exteriorevaporating su ace heated by the vapor from said evaporator, said shelldelivering to said pan and being provided with a liquid supplydelivering to the exterior of said shell.

5. An evaporating apparatus comprising in combination, a receiverprovided with an opening for the products of combustion, a hollowevaporator provided with an exterior evaporating surface delivering tosaid receiver and forming with its interior a flue for the products ofcombustion, a deflector proliecting into said evaporator for directingthe products of combustion against the interior thereof to heat theexterior, a liquid supply delivering to the exterior of said evaporator,a shell surrounding said evaporator and heated thereby and provided withan exterior evaporating surface delivering to said receiver, a liquidsupply delivering to the exterior, of said shell and heated by the vaporfrom said evaporator, and means for draining the water of condensationfrom said shell.

6. An evaporator comprising in combination, a hollow evaporator havingan exterior evaporating surface and forming with its interior a iiue forthe products of combustion, a deiiector projecting into said flue todirect the vproducts of combustion against the walls of said evaporator,and a liquid inlet delivering to the exterior of said evaporator andextending through said deflector.

7. An. evaporating apparatus comprising in combination, a hollowevaporator having an exterior evaporating surface and forming with itsinterior a flue for the products of combustion, a defiector projectinginto said flue to direct the products of combustion against the walls ofsaid evaporator, a liquid inlet delivering to the exterior of saidevaporator-"and extending through said deiiector, a shell surroundingsaid deflector and provided With an exterior evaporating surface andhaving its interior heated by the vapor arising from said evaporator, areservoir for said shell communicating with a source of supply andhaving overiiow outlets delivering the liquid to the exterior of saidshells, said reservoirs having outlets for the vapor arranged to heatthe contents of said reservoirs.

In testimony whereof I aflix my signature in presence of two witnesses.

TOZABURO SUZUKI.

Witnesses:

YAsUNosUxE FUKUKITA, JAMEs B. DAvIns.

